export default {
  async fetch(request) {
    if (request.method === 'OPTIONS') {
      return new Response(null, { headers: {
        'Access-Control-Allow-Origin': '*',
        'Access-Control-Allow-Methods': 'POST, OPTIONS',
        'Access-Control-Allow-Headers': 'Content-Type'
      }});
    }
    const { apiKey, apiSecret, fromEmail, fromName, toEmail, toName, replyTo, subject, body } = await request.json();
    const credentials = btoa(apiKey + ':' + apiSecret);
    const mjRes = await fetch('https://api.mailjet.com/v3.1/send', {
      method: 'POST',
      headers: { 'Authorization': 'Basic ' + credentials, 'Content-Type': 'application/json' },
      body: JSON.stringify({ Messages: [{ From: { Email: fromEmail, Name: fromName }, To: [{ Email: toEmail, Name: toName }], ReplyTo: { Email: replyTo }, Subject: subject, TextPart: body }] })
    });
    const data = await mjRes.json();
    return new Response(JSON.stringify(data), { status: mjRes.status, headers: { 'Content-Type': 'application/json', 'Access-Control-Allow-Origin': '*' }});
  }
};